My In Home Floor Firing Car Subwoofer. Designed and built by me. Uses 3/4 mdf for max anti-resonance, and bass. Mtx Blue Thunder 12" Subwoofer. The Box Is 14"x14"x13". Stands 4" off ground on little triangle feet for good sound and shake. Sealed box. Not hooked up to an amp yet, so its only pushing like 1/10th power it should be fed.